What side effects can occur with intermittent fasting?

This article was first published on September 26, 2022. It was last edited or updated on September 28, 2022. In general, intermittent fasting has very few side effects (Varady et al., 2022). Headaches sometimes occur when intermittent fasting is first started (Vardy et al., 2022). They are believed to be due to dehydration and increased water…